Water closet bowl



June 36, 3936. G` p, GAVIN f 944,243

WATER CLOSET BOWL Filed June '7, 1935 v l 4 7 l /x/ v///////// /z a Q @www2 L@ @wz/fm INVENTOR Y f v ,fanny a ATTORNEY Patented June 16, 1936 WATER CLOSET BGWL Gordon P. Gavin, Kohler, Wis, Application June 7, 1935, Serial No. 25,367

3 Claims.

My invention relates to improvements in water closet bowls, and the object of my invention is to provide a water closet bowl of a construction such that it is impossible under any conditions to remove any of the water from the bowl by back syphoning.

I attain this object by the construction illustrated in the accompanying drawing, in which Figure 1 is a plan view, certain parts being broken 1o away to show the interior construction, of a water closet bowl constructed in accordance with my invention, and Figure 2, a vertical sectional view along the lines 2 2 of Figure 1.

Similar numerals refer to similar parts throughout the several views.

The water closet bowl, designated generally by the numeral I, may be of any suitable construction, such as, for example, that shown in the illustration.

The water closet bowl I is formed into a water retaining space or well 2 extended rearwardly to form the dam 3 which, together with the downwardly extending dam 4 forms the up leg of a syphon-discharge passageway the down leg of which is designated by the numeral 5.

The dam 3 is of suihcient height to retain water in the well 2 to a point where the lowermost portion of the dam l will be immersed therein, thus providing a water seal and preventing the return of gases from the discharge pipe or sewer. A

water inlet 6 in the top of the bowl, adapted to receive a spud or other means for connection to a water supply pipe, discharges into a reservoir l.

Channels 8 extend downwardly on opposite sides of the syphon discharge passageway and communicate with the chamber 9. A jet I0 extends between the chamber 9 and the well 2 and is adapted to discharge into the up leg of the syphon discharge passageway to facilitate the syphon action.

The bowl is likewise provided with the flush rim Il having the usual channel I2 and flush holes I3 spaced about the lower side of said rim and adapted to discharge water downwardly into said bowl to cleanse the sides thereof.

The channel I4 provides communication between the reservoir I and the channel I2 of the flush rim II. It will be noted that the channel I4, channel I2 and ush holes I3 form a con- 50 tinuous passageway from the reservoir 1 to the interior of the bowl.

Thus upon flushing of the bowl water is delivered from a flush tank or ush valve, through inlet 6 to reservoir 'I and thence, simultaneously, to jet I0 through passageways 8 and chamber 3 and to the Ill and I2.

The construction thus far described is a conventional one. However, it 'has a serious disadvantage in that, if for any reason such as failure 5 of the water supply, a vacuum instead of a pressure be developed in the water supply line, the reverse action takes place and the water is syphoned from the bowl into the supply line where it becomes commingled with and con- 10 taminates the drinking water supply of the building.

I propose to remedy this defect and prevent back syphoning of the water in the bowl under any conditions by providing an air inlet to the l5 reservoir I which air inlet is above any possible level of the water in the bowl and will prevent any syphon action from developing by admitting air through the reservoir 1, thus preventing any Vacuum in the supp-1y line from being effective 20 to syphon the water from the bowl.

In the preferred form of construction shown in the illustration communication between the reservoir 'I and the exterior atmosphere is obtained through channels Ii, I2 and flush holes I3. 25

Thus, in case of a vacuum developing within the supply line, air is admitted to the reservoir 'I to equalize the pressure and eliminate the vacuum with its attendant syphoning eiect.

When water is supplied under pressure to reser- 30 Voir l, as during flushing of the bowl, this channel acts as a discharge passageway, hence the operation and eiiiciency of the bowl is not impaired.

As will be seen from Figure 2, flushing rim II 35 is higher at the rear of the bowl than at the front, and the channel I4, together with one or more of the flush holes I3, is above the level of the lowest point of the top of the ushing rim II, represented in Figure 2 by the lines A-A.

Hence is is impossible for the water level of the bowl, even in the case of clogging of the syphon discharge passageway, to rise suiliciently to seal the channel I 4 and its adjacent rim flush holes, since the water will overflow the flushing rim I I at its forward and lowermost point before it reaches a height sufficient to seal the channel Ili and the adjacent rim ush holes.

It will be evident that changes in the exact construction disclosed may be made without invention, such as, for example, providing an overow separate from the flushing rim or placing the lowermost point of the flushing rim in a different location; hence I do not restrict myself to the exact construction illustrated, but claim all rim flush holes I3 through channels constructions within the spirit of my invention and the scope of the appended claims.

I claim:

1. A water closet bowl comprising, in combination, a syphon discharge passageway terminating in a well adapted to retain water to provide a water seal, a jet adapted to discharge into said. syphon discharge passageway, a reservoir positioned above the water level in said well, a water inlet to said reservoir, a channel providing communication between said reservoir and said jet, a iushing rim positioned above the water level in said well and completely enclosed except for a plurality of flush holes therein and a channel providing communication between said reservoir and said iiushing rim, the channel providing communication between said reservoir and said flushing rim and one or more of said ush holes being above the level of the top of said ushing rim at its lowermost point said reservoir being completely enclosed except or said inlet, said jet cornmunicating channel and said flushing rim communicating channel.

2. A water closet bowl comprising, in combination, a reservoir, a water inlet thereto, a ushing rim, a channel providing communication between said reservoir and said flushing rim, and a plurality of flush holes in said flushing rim, the channel providing communication between said reservoir and said flushing rim and one or more of said ush holes being above the level of the top of said flushing rim at its lowermost point said reservoir being completely enclosed except for said inlet, said flushing rim communicating channel and a channel communicating with a jet positioned in said bowl.

3. A water closet bowl comprising, in combination, a reservoir, a water inlet thereto, a flushing rim, a channel providing communication between said reservoir and said flushing rim, and means for providing communication between said channel and the exterior atmosphere, said channel and said communicating means being positioned above the top of said flushing rim at its lowermost point the water from said reservoir being discharged into said bowl only from said ushing rim and a jet positioned below the normal water level of said bowl.

GORDON P. GAVIN. 

